This document contains an unsolved chemistry practice paper from 2008 for IITJEE (Indian Institute of Technology Joint Entrance Examination). It has four sections testing different chemistry concepts through multiple choice questions. Section I has 9 objective questions testing concepts like IUPAC names, compound identification, hybridization, and solubility products. Section II has 4 reasoning questions requiring understanding of statements. Section III has 3 linked comprehension questions about reaction mechanisms. Section IV contains 3 matrix-match questions testing relationships between concepts.

1. IITJEE –Past papersCHEMISTRY - UNSOLVED PAPER - 2008

2. SECTION – IStraight Objective TypeThis section contains 9 multiple choice questions. Each question has 4 choices (A), (B), (C) and (D), out of which ONLY ONE is correct.

3. 01ProblemThe IUPAC name of [Ni(NH3)4][NiCl4] isTetrachloronickel (II) – tetraamminenickel (II)Tetraamminenickel (II) – tetrachloronickel (II)Tetraamminenickel (II) – tetrachloronickelate (II)Tetrachloronickel (II) – tetraamminenickelate (0)

4. Problem02Among the following the coloured compound isCuClK3[Cu(CN)4] CuF2 [Cu(CH3CN)4]BF4

5. Problem03Both [Ni(CO)4] and [Ni(CN)4]2− are diamagnetic. The hybridization of nickel in these complexes, respectively, aresp3, sp3sp3, dsp2dsp2, sp3dsp2, dsp2

6. Problem04Among the following, the surfactant that will form micelles in aqueous solution at the lowest molar concentration at ambient conditions isCH3(CH2)15N+(CH3)3Br−CH 3(CH 2) OSO 3 −Na+ CH3(CH2)6COO−Na+CH3(CH2)11N+(CH3)3Br−

7. Problem05Solubility product constant (KSp) of salts of types MX, MX2 and M3X at temperature ‘T’ are 4.0 × 10−8, 3.2 × 10−14 and 2.7 × 10−15, respectively. Solubility's (mole dm−3) of the salts at temperature ‘T’ are in the orderMX > MX2 > M3X M3X > MX2 > MXMX2 > M3X > MX MX > M3X > MX2

8. Problem06Electrolysis of dilute aqueous NaCl solution was carried out by passing 10 milli ampere current. The time required to liberate 0.01 mol of H2 gas at the cathode is (1 Faraday = 96500 C mol−1)9.65 × 104 sec 19.3 × 104 sec28.95 × 104 sec 38.6 × 104 sec

9. Problem07Cellulose upon acetylating with excess acetic anhydride/H2SO4 (catalytic) gives cellulose triacetate whose structure isa.b.c.d.

10. Problem08In the following reaction sequence, the correct structures of E, F and G ara.b.c.d.

11. Problem09The correct stability order for the following species is(II) > (IV) > (I) > (III) (I) > (II) > (III) > (IV) (II) > (I) > (IV) > (III) (I) > (III) > (II) > (IV)

12. SECTION – IIReasoning Type This section contains 4 reasoning type questions. Each question has 4 choices (A), (B), (C) and (D), out of which ONLY ONE is correct.

13. Problem10STATEMENT-1: The geometrical isomers of the complex [M(NH3)4Cl2] are optically inactive.andSTATEMENT-2: Both geometrical isomers of the complex [M(NH3)4Cl2] possess axis of symmetry.STATEMENT-1 is True, STATEMENT-2 is True; STATEMENT-2 is correct explanation for STATEMENT-1STATEMENT-1 is True, STATEMENT-2 is True; STATEMENT-2 is NOT a correct explanation for STATEMENT-1STATEMENT-1 is True, STATEMENT-2 is FalseSTATEMENT-1 is False, STATEMENT-2 is TrueE

14. Problem11STATEMENT-1: [Fe(H2O)5NO]SO4 is paramagnetic.andSTATEMENT-2: The Fe in [Fe(H2O)5NO]SO4 has three unpaired electrons.STATEMENT-1 is True, STATEMENT-2 is True; STATEMENT-2 is correct explanation for STATEMENT-1STATEMENT-1 is True, STATEMENT-2 is True; STATEMENT-2 is NOT a correct explanation for STATEMENT-1c. STATEMENT-1 is True, STATEMENT-2 is Falsed. STATEMENT-1 is False, STATEMENT-2 is True

15. Problem12STATEMENT-1: Aniline on reaction with NaNO2/HCl at 0oC followed by coupling with β-naphthol gives a dark blue coloured precipitate.andSTATEMENT-2: The colour of the compound formed in the reaction of aniline with NaNO2/HCl at 0oC followed by coupling with β-naphthol is due to the extended conjugation.STATEMENT-1 is True, STATEMENT-2 is True; STATEMENT-2 is correct explanation for STATEMENT-1STATEMENT-1 is True, STATEMENT-2 is True; STATEMENT-2 is NOT a correct explanation for STATEMENT-1STATEMENT-1 is True, STATEMENT-2 is FalseSTATEMENT-1 is False, STATEMENT-2 is TrueE

16. Problem13TATEMENT-1: There is a natural asymmetry between converting work to heat and converting heat to work.andSTATEMENT-2: No process is possible in which the sole result is the absorption of heat from a reservoir and its complete conversion into work.STATEMENT-1 is True, STATEMENT-2 is True; STATEMENT-2 is correct explanation for STATEMENT-1STATEMENT-1 is True, STATEMENT-2 is True; STATEMENT-2 is NOT a correct explanation for STATEMENT-1STATEMENT-1 is True, STATEMENT-2 is FalseSTATEMENT-1 is False, STATEMENT-2 is True

17. SECTION – IIILinked Comprehension Type This section contains 2 paragraphs. Based upon each paragraph, 3 multiple choice questions have to be answered. Each question has 4 choices (A), (B), (C) and (D), out of which ONLY ONE is correct..

18. Paragraph for Question Nos. 14 to 16A tertiary alcohol H upon acid catalysed dehydration gives a product I. Ozonolysis of I leads to compounds J and K. Compound J upon reaction with KOH gives benzyl alcohol and a compound L, whereas K on reaction with KOH gives only M,

19. Problem14Compound H is formed by the reaction of]a.b.c.d.

20. Problem15The structure of compound I isa.b.c.d.

21. Problem16The structures of compounds J, K and L, respectively, arePhCOCH3, PhCH2COCH3 and PhCH2COO−K+PhCHO, PhCH2CHO and PhCOO−K+PhCOCH3, PhCH2CHO and CH3COO−K+PhCHO, PhCOCH3 and PhCOO−K+

22. Paragraph for Question Nos. 17 to 19In hexagonal systems of crystals, a frequently encountered arrangement of atoms is described as a hexagonal prism. Here, the top and bottom of the cell are regular hexagons and three atoms are sandwiched in between them. A space-filling model of this structure, called hexagonal close-packed (HCP), is constituted of a sphere on a flat surface surrounded in the same plane by sixidentical spheres as closely as possible. Three spheres are then placed over the first layer so that they touch each other and represent the second layer. Each one of these three spheres touches three spheres of the bottom layer. Finally, the second layer is covered with a third layer that is identical to the bottom layer in relative position. Assumer radius of every sphere to be ‘r’.

23. Problem17The number of atoms on this HCP unit cell is4 61217

24. Problem18The volume of this HCP unit cell isa.b.c.d.

25. Problem19The empty space in this HCP unit cell is74% 47.6%32% 26%

26. SECTION – IV (Total Marks)Matrix-Match Type This contains 3 questions. Each question contains statements given in two columns which have to be matched. Statements (A, B, C, D) in column I have to be matched with statements (p, q, r, s) in column II. The answers to these questions have to be appropriately bubbled as illustrated in the following example. If the correct match are A-p, A-s, B-r, C-p, C-q and D-s, then the correctly bubbled 4 × 4 matrix should be as follows:

27. Problem20Match the compounds in Column I with their characteristic test(s)/ reaction(s) given in Column II. Indicate your answer by darkening the appropriate bubbles of the 4 × 4 matrix gives in the ORS.Column I Column IIa (p) sodium fusion extract of the compound gives Prussian blue colour with FeSO4 (q) gives positive FeCl3 test (r) gives white precipitate with AgNO3 (s) reacts with aldehydes to form thecorresponding hydrazone derivative

28. Problem21Match the entries in Column I with the correctly related quantum number(s) in Column II. Indicate your answer by darkening the appropriate bubbles of the 4 × 4 matrix given in the ORS.Column I Column IIOrbital angular momentum of (p) Principal quantum number the electron in a hydrogen-like atomic orbital(B) A hydrogen-like one-electron wave (q) Azimuthal quantum number functional on obeying Pauli principle(C) Shape, size and orientation of hydrogen (r) Magnetic quantum number-like atomic orbital‘s(D) Probability density of electron at the (s) Electron spin quantum number nucleus in hydrogen-like atom

29. Problem22Match the conversions in Column I with the type(s) of reaction(s) given in Column II. Indicate your answer by darkening the appropriate bubbles of the 4 × 4 matrix given in the ORS.Column I Column IIPbS -> PbO (p) roasting3 CaCO -> CaO (q) calcinationZnS -> Zn (r) Carbone réduction2 Cu S -> Cu (s) self reduction

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